CN213781934U

CN213781934U - Arc extinguishing circuit with thyristor applied to relay

Info

Publication number: CN213781934U
Application number: CN202120092720.0U
Authority: CN
Inventors: 陈加生
Original assignee: Xiamen Dechuang Electronic Technology Co ltd
Current assignee: Xiamen Dechuang Electronic Technology Co ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-07-23
Anticipated expiration: 2031-01-14

Abstract

The utility model discloses an arc extinguishing circuit of relay is applied to silicon controlled rectifier, which comprises a relay, the first direct current input end electric connection of relay has direct current positive pole input port J2, the second direct current input end electric connection of relay has direct current negative pole input port J3, direct current positive pole input port J2 electric connection has direct current power supply's anodal output, and direct current negative pole input port J3 electric connection has direct current power supply's negative pole output. The utility model discloses concatenate a bidirectional thyristor switch BT1 at electric iron heating plate power source's both ends, switch on bidirectional thyristor switch BT1 in the twinkling of an eye that will cut off electric iron heating plate power supply for take over the relay, make and draw electric arc, the electric spark can not act on the inside metal shell fragment of relay, bidirectional thyristor switch BT 1's on-time is very short, also can not burn out, in addition the utility model discloses a low cost need not adopt too high-grade high-quality relay.

Description

Arc extinguishing circuit with thyristor applied to relay

Technical Field

The utility model relates to a relay arc extinguishing technical field especially relates to an arc extinguishing circuit of relay is applied to silicon controlled rectifier.

Background

The relay controls high-power heavy-current electric appliances, which are common in daily life, industrial power and military use, and the more high-power electric appliances require longer service life and higher natural cost. The relay adopts mechanical type bimetallic strip thermostat or high-grade power relay to control the temperature, wherein adopts mechanical type bimetallic strip thermostat to control the temperature as follows: the temperature control of the high-power iron usually adopts a bimetallic strip thermostat capable of adjusting the temperature, when the temperature rises to reach the required temperature, the bimetallic strip bends downwards due to heating, so that a power supply contact is separated, the power supply is cut off, and the temperature of the electric iron is not increased any more. When the temperature is reduced to a certain degree, the bimetallic strip is restored to the original state, and the power supply is switched on again. The electric iron is repeatedly switched on and off, so that the temperature of the electric iron is kept constant. The disadvantages of this temperature control method are: the temperature control precision is low, the temperature control effect is poor, the place contacted by the elastic sheet metal can be oxidized along with the increase of the using time, electric sparks can occur, the heat is generated, and the service life is short.

Wherein, the temperature of the mechanical bimetallic strip thermostat is controlled as follows: the method adopts electronic temperature control, monitors the temperature of the iron chassis in real time through a thermistor, and then controls the on-off control of the heating plate of the electric iron through a relay; when the temperature rises to reach the required temperature, the relay cuts off the power supply of the heating plate, and the electric iron does not heat any more. When the temperature is reduced to a certain degree, the relay is connected with the power supply of the heating plate. The electric iron is repeatedly switched on and off, so that the temperature of the electric iron is kept constant. However, the disadvantages of this approach are as follows: compared with a mechanical bimetallic strip thermostat, the temperature control of the mechanical bimetallic strip thermostat is high, and electric arcs and electric sparks can occur at the moment of disconnection of the relay, so that the metal elastic sheet inside the relay is oxidized and aged. Due to frequent on-off, the on-off of the relay is ineffective and ineffective, and the whole product cannot be used.

Based on the defects of the two modes, the arc extinguishing circuit of the relay with the silicon controlled rectifier is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the arc extinguishing circuit of relay is applied to a silicon controlled rectifier that proposes.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an arc extinguishing circuit that silicon controlled rectifier was applied to relay, includes the relay, the first direct current input end electric connection of relay has positive direct current input port J2, the second direct current input end electric connection of relay has direct current negative pole input port J3, the relay still includes interlock switch K1, and interlock switch K1's one end electric connection has commercial power live wire input port J1 and triac BT 1's one end, and interlock switch K1's other end electric connection has commercial power zero line input port J4 and triac BT 1's the other end, triac BT 1's control end electric connection has thermistor R1 that is used for carrying out real-time temperature monitoring to the flatiron chassis.

Preferably, the dc positive input port J2 is electrically connected to a positive output terminal of a dc power supply, and the dc negative input port J3 is electrically connected to a negative output terminal of the dc power supply.

Preferably, the live wire input port J1 of the utility power is electrically connected with the live wire of the utility power, and the zero wire input port J4 of the utility power is electrically connected with the zero wire of the utility power.

The utility model discloses concatenate a bidirectional thyristor switch BT1 at electric iron heating plate power source's both ends, switch on bidirectional thyristor switch BT1 in the twinkling of an eye that will cut off electric iron heating plate power supply for take over the relay, make and draw electric arc, the electric spark can not act on the inside metal shell fragment of relay, bidirectional thyristor switch BT 1's on-time is very short, also can not burn out, in addition the utility model discloses a low cost need not adopt too high-grade high-quality relay.

Drawings

Fig. 1 is a circuit diagram of an arc extinguishing circuit of a relay applied by a thyristor according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, an arc extinguishing circuit with silicon controlled rectifier applied to relay, including the relay, the first dc input end of relay has dc positive input port J2, the second dc input end of relay has dc negative input port J3, dc positive input port J2 has dc power supply's positive output end, and dc negative input port J3 has dc power supply's negative output end, the relay further includes interlock switch K1, one end electric connection of interlock switch K1 has commercial power live wire input port J1 and one end of bidirectional silicon controlled rectifier switch BT1, the other end electric connection of interlock switch K1 has commercial power zero line input port J4 and the other end of bidirectional silicon controlled rectifier switch BT1, commercial power live wire input port J1 is electrically connected with the live wire of commercial power, and zero line input port J4 is electrically connected with the zero line of commercial power, the control end electric connection of bidirectional silicon controlled rectifier switch BT1 has the other end electric connection that is used for carrying out real-time temperature monitoring to the flatiron chassis Thermistor R1 concatenates a triac BT1 at electric iron heating plate power source's both ends, switches on triac BT1 in the twinkling of an eye that will cut off electric iron heating plate power supply for take over the relay, make and draw electric arc, the electric spark can not act on the inside metal shell fragment of relay, triac BT 1's conduction time is very short, also can not burn out, in addition the utility model discloses a low cost need not adopt too high-grade high-quality relay.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an arc extinguishing circuit that silicon controlled rectifier was applied to relay, includes the relay, its characterized in that, the first direct current input end electric connection of relay has positive direct current input port J2, the second direct current input end electric connection of relay has direct current negative pole input port J3, the relay still includes interlock switch K1, and interlock switch K1's one end electric connection has commercial power live wire input port J1 and triac BT 1's one end, and interlock switch K1's other end electric connection has commercial power zero line input port J4 and triac BT 1's the other end, triac BT 1's control end electric connection has the thermistor R1 that is used for carrying out real-time temperature monitoring to the flatiron chassis.

2. The arc extinguishing circuit of the thyristor for relays as claimed in claim 1, wherein the dc positive input port J2 is electrically connected to the positive output of the dc power source, and the dc negative input port J3 is electrically connected to the negative output of the dc power source.

3. The arc extinguishing circuit of the silicon controlled rectifier applied to the relay as claimed in claim 1, wherein the live wire input port J1 of the commercial power is electrically connected with the live wire of the commercial power, and the neutral wire input port J4 of the commercial power is electrically connected with the neutral wire of the commercial power.